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Wagon Unloading Device

Description: Patent for "Improvements in Wagon-Unloading Devices" including illustrations.
Date: February 3, 1920
Creator: Ford, John Owen
Partner: UNT Libraries Government Documents Department

Piston-Ring

Description: Patent for compound piston rings with an improved fit.
Date: November 30, 1920
Creator: Hall, Samuel J.
Partner: UNT Libraries Government Documents Department
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